I lay on the studio bed and worked my fingers into the folds of my pussy as Mark took picture after picture with his camera.
I was transfixed looking at his cock, now developing into a full sized boner, as he got more turned on.
His cock head was all purple and angry and the veins in its shaft pulsed, his foreskin was rolled right back and his tight ball sac was on show with very little pubic hair to obscure it.
Don't get me wrong, at this age I'd had boyfriends and the odd sexual experience, mainly being fingered and wanking them off
But Mark was a real man.......